# Seroval: Memory exhaustion via unchecked TypedArray length in JSON deserialization Advisory record · `GHSA-jp82-f5mq-hwhp` - **Identifiers:** `GHSA-jp82-f5mq-hwhp` · `CVE-2026-104845` - **State:** Confirmed - **Severity:** CVSS 7.5 High - **Critical:** No - **Weakness (CWE):** [CWE-770](https://cwe.mitre.org/data/definitions/770.html) - **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md) - **Published:** 5 Oct 2026 - **Updated:** 5 Oct 2026 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 5 Oct 2026, 23:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `seroval` (npm): affected `<1.6.3`; fixed in `1.6.3` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Seroval versions before 1.6.3 are affected. When deserializing TypedArray data from JSON, the library does not validate the input's type or bound the element count, so a small JSON payload that specifies a very large length can make the deserializer allocate a large amount of memory synchronously. An unauthenticated remote attacker who can send untrusted Seroval JSON to a service that deserializes it could exhaust CPU and memory and stall the event loop, with no confidentiality or integrity impact. Upgrade to seroval 1.6.3 or later, which is listed as the fixed version. Written 31 Oct 2026. ## Not analysed yet We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check. ## Severity and exploitation - 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from CNA (GitHub_M) - **CISA KEV:** Not listed. - **EPSS:** 0.0043, the 37th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 31 Oct 2026, 13:34 UTC: First seen by agentprime - 31 Oct 2026, 13:34 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-jp82-f5mq-hwhp) ## Sources - [GitHub Advisory Database: GHSA-jp82-f5mq-hwhp](https://github.com/advisories/GHSA-jp82-f5mq-hwhp) - [OSV: GHSA-jp82-f5mq-hwhp](https://osv.dev/vulnerability/GHSA-jp82-f5mq-hwhp) - - - - - Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code. ## Check whether this affects you A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet. - With the agentprime MCP server (), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .